Boilee furnace



(No Model.)

T YORK BOILER FURNACE. No. 552,031 Patented Dec. 24,1895.

wilbneaoeo UNITED STATES PATENT OrFicE,

THOMAS YORK, OF PORTSMOUTH, OHIO.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 552,031, dated December 24, 1895. Application filed July 10, I895. Serial No. 655,461. (No model.)

To aZZ whom, it may concern.-

Be it known that I, THOMAS YORK, a citizen of the United States, residing at Portsmouth, in the county of Scioto and State of Ohio, have invented certain new and useful Improvements in Steam-Boiler Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in the steam-boiler furnace described and shown in the Letters Patent of the United States of America granted to me on the 12th day of February, 1895; and the objects of those improvements are to further economize the fuelconsumption, increase the rapidity and completeness of combustion, accelerate the boiler action, and better adapt the furnace to a varied range of engines.

Referring to the Letters Patent above mentioned, it will be seen that I separate the furnace-grate into two longitudinal horizontal sections by a dividing-wall over which the heat-current passes from one section to the other, whence it makes its way to the very rear of the boiler, and thence, by means of fire-tubes, through the boiler to the front thereof, where provision is made for discharging it into the atmosphere by a funnel or stack in the ordinary manner. It will also be seen that I alternate the furnace-draft, so as to blow only one section of the grate-fire at a time, in order that the heat-current, produced as just described, may not be neutralized or obstructed by a counter-current caused by blowing both grate-sections at the same time. By the means described in the said Letters Patent I manage to so thoroughly convert the fuel into heat as to produce a practically smokeless furnace.

The improvement I have made, and now seek to patent, consists substantially in carrying my grate-dividing wall up to the boilershell, aperturing it for the passage of the heatcurrent from the blown grate-section over and back of the other; making the wall hollow, instead of solid, so that the gases of the combustion may fill it, and by aperturing the front face of the hollow wall, for the admission of air to the interior, intensify the combustion and accelerate the current.

In the accompanying drawings,wherein like letters represent like parts, and in which the parts taken from the aforesaid Letters Patent are designated by their original letters, Figure 1 is a vertical longitudinal section of a furnace, showing my device; Fig. 2, a vertical cross-section thereof, and Fig. 3 a horizontal section through the lower part of the furnace.

A is the boiler, and B the roomy casing in which it is tightly inclosed. C is the divided grate. D represents the two doors of the draft chambers(also serving as the ash-pits) below the grate, and E represents the pair of fuel and stoking doors above the grate. F is the funnel or stack. These are all unaltered parts of the former construction.

G is the wall, rising vertically from the base of the boiler-case to the bottom of the boiler, dividing the grate centrally and longitudinally, and extending back till it unites with the cross-wall H, which also rises from the base of the casing to the bottom of the boiler, and, like the other wall, embraces the segmental outline of the boiler tightly. The wall G is hollow within providing a long, high, narrow chamber g, and through the wall above the grate-level, and running longitudinally from nearly the front to the rear of the wall, is an aperture 1), through which the gases of combustion formed by the grate-fires can enter and leave the chamber within the wall. Draft-holes 0, preferably with an inward taper, are formed in the otherwise solid face of the wall below the grate-level to increase the draft by which the gases are to be blown into a current to take them to the rear of the boiler. For the passage of this current, an outlet d, closed by a hand-operated valve-stopper e, is formed above the grate-level in the wall H, one outlet at the rear of each grate-section.

I am aware that it is not new to construct boiler-furnaces with apertured and chambered inner walls, by which the furnace-grate beneath the left-hand grate-section and close the other. Open also the right-hand outlet in the back wall of the furnace and close the other. The fire on the left-hand grate-section will be blown, and the heated gases will pass through and into the chambered dividing-wall, and the draft-holes in that wall will assist the draft beneath the active fire in further vaporizing them and forcing them through the open outlet of the back furnacewall. Unable otherwise to expand or escape they will pass into and through the fire-tubes a of the boiler to the front of the boiler-case, and be drawn out through the funnel and mingle with the atmosphere, robbed of smoke in their long and fieryjourney, though I here reserve the right of claiming, in a separate application, further improvements for passing these gases again through fire and boiler, or otherwise using them before their final dispersion.

WVhen the left-hand fire-section needs stoking, it can be thrown out of use by closing its draft-door and corresponding outlet in the back wall and opening the other door and outlet.

I may choose to stopper the draft-holes in front of the partition-wall in any suitable manner, but in practice have not found that they need closing at any time, except possibly when the fires are to be started or banked.

I claim as follows: The combination, in a steam boiler furnace, of the casing inclosing the boiler; the funnel at the front end of the boiler; the grate be- .face of the casing; the cross wall in rear of the grate, extending upward from the floor of the casing, closely engaging the shell of the boiler, and having the pair of outlets above the grate level, each provided with a valvestopper; and the partition wall longitudinally bisecting the grate, extending upward from the floor of the casing to a close engagement with the boiler shell, provided with the horizontal aperture in the upper part of said wall and the vertical chamber within said wall, and having also the draft holes in the front face thereof; the whole constructed and arranged substantially as and for the purposes described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS YORK. i Witnesses:

CHAS. E. MOLSTER, JOHN McCoNNELL. 

